netdev - Re: BUG: unable to handle kernel NULL pointer dereference at 000000000000002c

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Message-ID: <4F2A87B0.6070900@profihost.ag>
Date:	Thu, 02 Feb 2012 13:55:12 +0100
From:	Stefan Priebe - Profihost AG <s.priebe@...fihost.ag>
To:	David Miller <davem@...emloft.net>
CC:	greg@...ah.com, eric.dumazet@...il.com, jwboyer@...il.com,
	hch@...radead.org, netdev@...r.kernel.org, david@...morbit.com,
	stable@...r.kernel.org, gregkh@...e.de
Subject: Re: BUG: unable to handle kernel NULL pointer dereference at 000000000000002c


> Such a non-trivial backport has the danger of adding as many bugs as
> it is intended to fix.
> 
> Therefore I will not be attempting to make this fix feasible for
> 3.0.x-stable, sorry.
> 
> I seriously suggest that if you really are hitting this race (the
> exposure is very small, it only happens if you get redirects and
> redirects are not common for most hosts) that you move to a more
> recent kernel such as 3.1.x or 3.2.x, both of which have all the
> dependencies as well as the bug fix applied.

I fully understand that - i'm seeing this bug 2-3 times a week while
running a bunch of > 1000 servers.

I don't want to go to 3.1 or 3.2 as they're not long term.

So i'll try to make own backport. First steps done and seems to work
fine. Sadly i'm not a C programmer...

Greets

Stefan

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